Lamp-fixture.



A. D. CURTIS.

LAMP FIXTURE.

APPLICATION FILED FEB-9,1914.

1,214,514. Patented Feb. 6,1917.

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AUGUSTUS D. CURTIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL X-RAY REFLECTOR- COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LAMP-FIXTURE.

Specification of Letters Iatent.

Patented Feb. 6, ilflilt'.

Application filed February 9, 1914. Serial No. 817,434.

To all whom it may concern:

Be it known that I, AUGUSTUS D. CURTIS, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lamp-Fixtures; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part ofthis specification.

This invention relates to lamp fixtures and more particularly to such lamp fixtures as include reflectors or other devices placed in close juxtaposition to the lamp and apt to be damaged by the heat of the lamp.

The invention consists of the matters herein described and more particularly'pointed out in the appended claims.

The invention is of particular advantage in connection with the use of incandescent electric lamps of high candle power and especially in connection with the modern incandescent lamp in which the filament in the glass bulb, instead of being in vacuo is surrounded by a gas, such as nitrogen. In such a lamp, the heat of the filament is conducted by the gas to the glass bulb with the result that all parts located near the bulb, as for example, the reflector, the socket, and other parts of the lamp fixture, are raised to degrees of temperature which they are not adapted to stand without detriment to the functions they are intended to perform.

The object of my invention is to provide in connection with a lamp and particularly, in connection with an incandescent lamp of the type referred to, in which ex cessive heat is communicated to the parts of the fixture used in connection with the lamp,means for absorbing and for dissipating to the surrounding atmosphere, the excess heat produced by the lamp.

In illustrating my invention, I have shown it as applied to an incandescent electric lamp fixture including a reflector.

In the drawings: Figure 1 is a view representing a vertical central section through an electric light including an incandescent electric lamp and an inverted reflector, the same belonging to the system of electric lighting known as the indirect lighting sysv tem. Fig. 2 is a view representing a partial vertical section similar to Fig. 1, but on an enlarged scale. Fig. 3 is a view representlng a transverse section through Fig. 2 in a plane indicated byline 33 of Fig. 2. Fig. 4 is a view representing a vertical section through an incandescent electric light fixture including an incandescent lamp, and a reflector of the kind used in a direct lighting system.

Referring now to that embodiment of my invention shown in the drawings, and more particularly to that shown in Figs. 1 to 3 inclusive, 10 indicates an incandescent electric lamp bulb attached to a socket 11, which is supported by a fixture 12 in any convenient manner.

13 indicates as a whole, a reflector of the inverted type suspended as shown in the drawings by means of a spider 14 attached to the fixture 12. The reflector 13 comprises an inner shell 15, which is of glass or of any other suitable material adapted for reflecting purposes, and an outer shell or bowl 16. The reflector proper 15 is supported within the bowl 16 by means of arms or lugs 17 attached to the bowl near its upper edge and having supporting engagement with the reflector 15 near its upper edge. Said arms or lugs hold the bowl and reflector apart in such manner as to provide an air space 18 surrounding the reflector proper 15 and.

communicating at the upper edge of the reflector with the outer atmosphere.

The heat of the lamp 10, unless otherwise dissipated, will apparently attack the re flector 15, as well as other parts of the lamp fixture and where the heat is intense as in the case of lamps of the kind above referred to, will tend to tarnish, discolor, crack or burn the reflector, and thus damage and diminish or impair its reflecting power. To obviate this difficulty, I provide the following construction: 19 indicates a member which, as shown, consists of a ring of copper or of other suitable metal adapted to rapidly absorb the heat. Said ring is conveniently placed below the lower end of the incandescent globe, but may be placed in any other position where it will receive the hottest rays from the lamp, and at the same time interfere as little as possible with the action of the reflector. The function of this ring is to collect and absorb the heat from the lamp, as rapidly as possible, so as to prevent said heat from attacking the other parts of the fixture.

. preferably of a corrugated disk which provides a maximum of superficial area for radiating purposes with a disk of minimum diameter. The said disk rests,upon and is secured to lugs 21 which act to support it in,proper relation between the shells. The heat absorbing member 19 is connected to the heat dissipating member 20 by means of a corrugated sleeve 22 which has attached to its upper end an annular trough-like flange 23 that directly receives and supports the heat collecting ring 19.

The operation of my improved construction is apparent from the above description. The intense heat of the lamp is rapidly and quickly absorbed by the heat collecting ring 19, and then conducted by the sleeve 22 to the heat dissipating disk 20. From the disk 20 the heat is communicated to the air in the space between the two reflector shells 15-16 by which it is rapidly communicated to the outer atmosphere without damage to the reflecting surface of the reflecting member or to other parts of the fixture;

, In Fig. 4, I have shown a mo ified form of the invention in which the reflector is of the usual type, as in the ordinary direct lighting system, instead of being inverted. In said figure, like parts are indicated by like numerals with the superfix a. The reflector in this case instead of comprising two shells is made of a single shell 13. The dissipated member 20 instead of being a simple disk is shown as consisting of a corrugated shell made in the form of the segment of a sphere. connects the heat collecting ring 19 with the heat dissipating member 20 is illustrated as consisting of a plurality of bars instead of a sleeve, as in the case heretofore described. The function and operation of .the parts are the same.

While in describing my invention, I have referred to certain details of mechanical construction and arrangement of the parts, it is to be understood that'the invention is in no way limited thereto except as may be pointed out in the appended claims.

The sleeve 22, which.

I claim as my invention:

1. In combination with a lamp fixture, a a

lamp and a reflector, aheat absorbing member in near relation to said lamp for absorbing the heat generated thereby, said member being located within the refiector;a

heat dissipating member supported by said fixture without the reflector, and a heat conducting member connecting said heat absorbing member with said heat dissipating -member, said heat absorbing, heat conducting and said heat dissipating members being reflector, a heat dissipating member located in the air space between said reflecting shell and the said bowl, and heat conducting means connecting said heat collecting member with said heat dissipating member.

3. In a lamp fixture including a lamp and a reflector, a heat absorbing member within said reflector, a heat dissipating member located in close proximity to said reflector and means supporting said heat absorbing mem ber upon said heat dissipating member, said supporting means forming a heat conductor between said heat absorbing and said heat dissipating members.-

4. In a lamp fixture including a lamp and a reflector of the inverted type, comprising an inner reflecting shell and an outer bowl, means supporting said reflecting shell within said bowl to provide an air space communicating with the outer atmosphere, a metallic ring-within the reflector adapted to absorb the heat from the lamp, a corrugated heat dissipating disk located in the air space between said reflecting shell and bowland a sleeve mounted on said disk, adapted to support said metallic ring, said sleeve forming a heat conductor between said ring and disk. I

In testimony, that I claim the foregoing v as my invention I aflix my signature in the presence of two witnesses, this 7th day of February A. D. 1914.

AUGUSTUS D. CURTIS; Witnesses T. H. ALFREDS, MARY MCCARTHY. 

